What is your experience with Delco verses reproduction cowl induction vacuum actuators. I have two BB cowl induction vehicals ( 71' El Camino and 72' Chevelle), one with a Delco actuator and the other with a reproduction one. The Delco actuator works great, however the reproduction doesn't want to close the flap all the way. I have switched them between the vehicals and the same thing happens. The reproduction actuator looks very new, however, is this one of those parts where Delco is the only way to go. Are the Delco actuators still available?